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CHROOT(8) OpenBSD System Manager's Manual CHROOT(8)
NAME
chroot - change root directory
SYNOPSIS
chroot [-g group,group,...] [-u user] newroot [command]
DESCRIPTION
The chroot command changes its root directory to the supplied directory
newroot and executes command, if supplied, or an interactive copy of the
user's shell.
The chroot command is restricted to the superuser.
The options are as follows:
-g group,group,...
Override the primary and supplemental group IDs. The primary
group ID is set to the first group in the list. Any remaining
groups are placed in the supplemental group ID vector. Each
group listed must exist in the
group(5)
databases.
-u user
Set user ID to user (which must exist in the
passwd(5)
database).
The primary and supplemental group IDs will be set based on the
user's entries in the
passwd(5)
and
group(5)
databases unless
overridden by the -g option.
ENVIRONMENT
SHELL If set, the string specified by SHELL is interpreted as the name
of the shell to execute. If the variable SHELL is not set,
/bin/sh is used.
SEE ALSO
chdir(2)
,
chroot(2)
,
setgid(2)
,
setgroups(2)
,
setuid(2)
,
group(5)
,
passwd(5)
,
environ(7)
HISTORY
The chroot utility first appeared in 4.4BSD.
CAVEATS
chroot should never be installed setuid root, as it would then be possi-
ble to exploit the program to gain root privileges.
OpenBSD 4.2 May 31, 2007 1
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